12112111122 has 32 divisors (see below), whose sum is σ = 25011976704. Its totient is φ = 3906144000.

The previous prime is 12112110943. The next prime is 12112111133. The reversal of 12112111122 is 22111121121.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1218372 + ... + 1228272.

It is an arithmetic number, because the mean of its divisors is an integer number (781624272).

Almost surely, 2^12112111122 is an apocalyptic number.

12112111122 is an abundant number, since it is smaller than the sum of its proper divisors (12899865582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12112111122 is a wasteful number, since it uses less digits than its factorization.

12112111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16514.

The product of its digits is 16, while the sum is 15.

Adding to 12112111122 its reverse (22111121121), we get a palindrome (34223232243).

Subtracting 12112111122 from its reverse (22111121121), we obtain a palindrome (9999009999).

The spelling of 12112111122 in words is "twelve billion, one hundred twelve million, one hundred eleven thousand, one hundred twenty-two".